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CentOS High Availability by Mitja Resman

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Chapter 12. STONITH on CentOS 7

In this chapter, you will learn how to configure and test cluster node fencing with STONITH on CentOS 7 and Pacemaker. You will become familiar with the fencing options available and learn the syntax used to configure them. You will also learn how to take your fencing configuration for a test drive and make sure it works as expected.

Fencing

Fencing is an important cluster task. It isolates a computer cluster node when the node misbehaves in order to protect the shared cluster resources and prevent cluster disruption. If you do not configure fencing, a misbehaving computer cluster node can corrupt the cluster data. This is why it is necessary to exclude the problematic cluster node from cluster configuration immediately. ...

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